Individual calling-key.



ll. P. 'GEER a; R. 0. LEAKB. INDIVIDUAL OALLING KEY. APPLICATION FILED MAY 10, 1911.

1,105,766; Patented Aug. 4, 19m

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1,105,766 Patented A 1g.4, 1914.

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wlmi ssis; INVENTORS I. F. GEEK 8r. R. G. LEAKE. INDIVIDUAL CALLING KEY.

.u'rmcu'lon nLnn MAY 10, 1211.

Patented Aug. 4, 191';

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UNITED STATES OFFICE.

MAURICE F. GEER AND RICHARD C. LEAKE, OF ROCHESTER, NE! YORK, ASSIGNORS TO GENERAL RAILWAY SIGNAL COMPANY, OF GATES, NEW YORK, A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Aug. 4, 1914.

Application tiled May 10, 1911. Serial No. 626.285.

To all whom it may concern.

Be it known that we, Mauuicr I Gniin and lliciiann C. Luann, citizens of the United States, and residents of the city of Rochester, in the county of Monroe and State of New York, have invented a new and useful Individual Calling-Key, of which the following is a specification.

This invention relates to an individual calling key and especially to an individual calling key for use in a system of selective signaling in which all energy is supplied from a central station.

The primary ob'ect of this invention is to so construct an individual calling key of the kind described, that it will not only govern impulses of electricity sent to a pair of l ne wires, but it will also govern tie starting and stopping of a generator to furnish current for said impulses.

A further object of the invention is to so constructan individual calling key of the nature described that it may be ad usted so as to send out any desired number of impulses of any desired polarity, within its range.

A further object of the invention is to so construct an individual calling key of the nature described that a call may be made with a minimum of ctl'ort and attention.

A further object. of the invention is to so construct a calling key of the nature dcscribwh that a plurality of the same may he assembled to any desired extent depending upon the number of stations on a line.

The invention consists of means for attaining the hcrcinbel'ore statcd objects and others, which will later appear as the description of the physical embodiment used to illnst rate our invention, progresses.

At the present time there are two general methods in use for operatin selective signaling systems, distinguished one from the other by the mode of supplying electrical energy for the o ici'ation ot the system. TllL first method, called the local energy systcm, employs batteries located at each station where a selector is located, for the purpose of supplying electrical energy for the operation of a signaling device which is caused to operate by the operation of the selector. The second method, called the central energy system, employs no batteries at the local stations but supplies all energy needed for the operation of the system from the central station. The central energy systems may be again divided into three classes, the first of which employs a battery at the central station for the purpose of supplying electrical energy; the second of which employs a continuously running generator, such as a dynamo or converter for su )plying electrical energy; the third of which employs a generator of some description which is started before a call is made, and stopped after the call is made. If primary batteries are used in either of these systems, a large expense for maintenancc arises, for, whether in use or at rest, a. primary battery constantly deteriorates and it has been found that both the local energy systems and the central energy systems employing primary batteries, are exceedingly expensive and of the two, the local energy system is the more expensive. [f secondary batteries are used, the expense of maintaining the batteries should be decreased, but on the other hand, when secondary batteries are used, a large initial outlay is needed to install charging apparatus therewith, and a further constant expense for the services of a skilled attendant to attend the batteries, so that the substitution of secondary batteries for primary batteries in a local energy system, although giving more Satisfactory results as far as operation is concerned, is really more expensive than the use of primary batteries. In central energy schemes, secondary batteries have been substituted for primary batteries with much better results, but due to the fact that a comparatively high voltage must be im pressed upon the line wires of the system at the central station a large number of but teries must be installed, which necessitates a very large initial outlay and because of the fact that the amount of current required to operate the system is very slight, the batteries are not discharged often enough to keep them in good condition, so that they deteriorate more rapidly than is saiu-tioue'l by good engineering practice.

ten

If a generator is used in the central ener y systems, it must be of such a type and )e designed so rugged, that it maybe run continuously 24- hours of the day and every day in the year, which, to one skilled in the art means almost an im )ossibility, so that it is readily understood that duplicate apparatus must be installed which, of course, necessitates a very large initial outlay. If a converter is used, operated by current derived from a commercial line, duplicate a)paratus does not entirely solve the difliculty for the means to furnish current to the line may also fail. It has also been found that in such a system, the continuously running apparatus must have skilled attention, and as the ordinary operator employed in a selective signaling system does not have the necessary skill, some other person must be employed to care for the apparatus, thus increasing the cost for maintenance.

Systems employing an intermittently running "enerator would seem to be the most practical method of operating a selective signaling system, but in practice such systems have been found to be more objectionable than any of the others, for in making a. call, employing such a system, three operations are necessary, first; the generator must be started and allowed to obtain sufficient speed to generate sutlicient voltage; second, call must be sent, and third, the generator must be stopped. In practice it has been found that the first step is very often neglected and as a consequence much loss of time ensues and tempers are not improved, and it has also been found that; unless strict watch is kept upon the operators they will neglect to stop the generator after the call has been made in order to do away with the necessity of starting the generator before the next call. \Vhen such tricks are. resorted to, the system and apparatus sull'ers severely for the generator not being designed to run continuously, soon wears out and has to be replaced, and furthermore, the. cost for electrical energy is very greatly increased so that it approaches very closely to those systems using the continuously running generator. Another dillicultv with this system, when the generator is allowed to run continuously, arises from the fact that the generator not being designed to run continuously and therefore. not furnished in duplicate, as soon as it wears out or breaks down, throws the entire system out of operation. As a general conclusion it may he said that it. has been found to be desirable in systems designed for continuous uninterrupted operation where electrical energy is employed to, if possible, depend in the last instance upon batteries.

In the case of systems governing the movements of trains, which must act uninterruptedly and continuously all of the time,

it has been found by experience extending over long period of time, that for continuous and uninterrupted oieration, reliance had best be placed upon batteries for furnishing electrical energy and for the same reason, a selective system which must also 0 crate continuously and uninterrnptedly, s iould depend for its source of energy upon batteries, but at the same time the number of batteries should be such that they will be obliged to furnish suflicientcurrent to keep them in proper condition.

Applicants'have. therefore. devised a s vs tcm of selective signaling of such a char acter that batteries will be. depended upon for a supply of electrical energy and the bat teries are employed in such number as to be economical.

The principle underlying applicants invention will be hereafter fully explained and the concrete physical embodiment by which applicants princi )le can be practically applied, will be exp ained in such full, clear and concise manner that any one skilled in the art may readily understand the same and in order to have a more ready comprehension of the invention, applicants have supplemented the description by full and com ilete drawin s, in which like characters of reference (esignate similar parts and in which:

Figure 1, is a plan view of the individual calling key, with some parts broken away. Fig. 2, is a front. elevation of the-imlividual calling key. Fig. 3, is a side elevation of the individual calling key looking in the direction of the arrow (1., Fig. .2. Fig. l, is a cross-sectional elevation on the line .\'-l, of Fi 3, looking in the direction of the arrow 1). Fi 5, is a cross-sectional elevation on the hue AB, of Fig. 3. looking in the direction of the arrow 0. Fig. (i, is a rear elevation of the individual calling key. Fig. 7, is a cross section on the line -l), of Fig. 2. Fig. 8, is a diagrammatic vicw showin the system employing the individual calling key.

(nstructi0n.l designates a back mounting plate, and 2. designates a front mounting plate, the two plates being separated by the spacing sleeves 3, 4, which. at their forward ends have. a reduced )Ul'llflll which passes through the front plate and also forms a shoulder for the front plate to bear against, and have a shoulder 5 and (3 respectively, formed thereon, against which the buck date 1, abuts. the sleeves beiug reduced at this point and extending rearwardly of the back plate any desired distance, such that the key may be. spaced from a supporting wall the desired amount. and may be attached to a supporting wall by the Screws 7 and 8, which pass through the sleeves it and 4 respectively, and are screw threaded upon their inner ends to engage with a screw threaded member upon the supporting wall. The back plate 1 and the front plate 2, are further separated by the members 9 and 10, which extend therebetwccn and are reduced in size on the forward end so as to form a shoulder against which the front plate bears, and which have a reduced portion passing through the front plate which is made of such a length that it may be upset so as to form a rivet head, to hold the members 2) and 1.0 rigidly to the front plate and which is drilled and tapped in its rcarend to receive screws 10 and 20, to hold the back plate firmly thereto; a shaft 11 passes through both the front and the back plates through the holes formed therefor and bears on its outer end a cross piece 14, to which are attached two knobs 12 and 13, a screw 15 fastening the cross piece rigidly to the shaft; and a short distance. in front of the front plate the shaft bears a metallic sector 16, which has rigidly attached thereto a collar 17, both the sector and the collar having ahole thercthrough, through which the shaft passes and the collar has two holes drilled from the periphery thereof to the center hole, which two holes are screw threaded and adapted to receive 2 round head cap screws 18, which, when snllicient-ly screwed in, bear against the shaft 11 and hold the sector in adjusted position; between the sector and the front plate, a collar 21 is placed which collar has a hole therethrough, through which the shaft 11 passes and has a pin 29. rigidly inserted therein so as to extend diametrically from the center of the shaft.

523 designates two round head ca screws which are screwed into drilled and tapped holes in the collar and which, when Slllllcicntly screwed in bear against the shaft. it and hold the collar 21 in adjusted position. Between the front and back plates 1 and 9., the shaft. ll has rigidly attached thereto, the sleeve .Z-l by means of the pin '27, the forward end of the sleeve bcin reduced and the forward cud of the reonced portion bears against the. back side of the trout )late 3, so that co-acting with sleeve ll, iearing against. the front: of the plate .2, and which can be rigidly screwed to shaft l l. a means is provided for preventing longitudinal move ment. of the shaft ll; disk 26 is mounted upon the sleeve it and bears against the shoulder 21' thereof, and serves to keep the spiral spring 28 in place, the inner end of the spiral spring having a hole thercthrough, through which the pin 9.5 extends and the outer end having a loop formed therein and passed about the mem an" 9, best shown in Fig. Ii, the end forming the loop being bent back a lull itself and riveted to the main spring by means of the rivet 29, best shown in Fig. lnternualiate the ends of the sleeve .21 is an enlargement 30, the periphery of which is cut into the form of ratchet teeth, best shown in Fig. 4, and a pawl 31 pivoted on a stud rigidly attached to gear 33, is adapted to engage with the said ratchet wheel, being pressed into engagement therewith by reason of the spring 2H, one end of which is attached by means of pins 35 to the wheel 253' the other end of which bears against. the pawl, all as best shown in Fig. .l. The gear wheel 33 has a hole through the center thereof which tits upon a hub on the sleeve 24 in such manner that it may rotate freely thereon, but is restrained from longitudinal movement thereon,by abutting against the shoulder 36 on onevside and by reason of the disk 37 fastened thereto by means of a screw 38 on the other side, the said disk having a hole therethrough which allows the sleeve 24 to pass thercthrough and to rotate therein, but is prevented from longitudinal movement by reason of the collar 39, all as best shown in Fi 7. By reference to Fig. 4, it; will be seen that gear wheel 33 meshes with pinion 40, which is rigidly attached to a gear wheel ll, fastened to a shaft 42, jonrnalcd in the front and back plates 1 and 2; said gear wheel 41 meshing with the pinion 43 which is rigidly attached to the gear-wheel H, fastened to the shaft 45, journaled in bean ings in the front and back plates 1 and 2; the gear wheel 4t meshes with pinion 46, which is rigidly attached to gear wheel 47, which meshes with a pinion -18, thegear wheel 47 being fastened to a shaft 4t) journaled in bearings in the front and back plate, the pinion 48 being rigidly attached to a shaft 50, which passes through the back plate 1 and has a cross piece at attached thereto by means of the screw 52; 53 designate weights attached by means of pins M to each end of the cross-arm ill in such manner that they may move freely in and out toward the shaft and adapted to hear agaimt the inside face of a cup an attached to the back plate 1.

The shaft 42 extends through the front plate .2 and bears a sleeve fit which is fastened thereto by means of screws 57', 5h designates a pin fastened to the sleeve 5t) and projecting therefrom, best shown in l ig. so that it will lie in the path of pin 22: 59 designates a contact. disk having teeth 0 in the periphcijv thereof, best shown in Fig. 2, wlnch has :t hole through the center adapted to receive a reduced extension of slreve 56: (ll designates a ring contact dish. best. shown in side elevation in Fig. I). and in front elevation in Fig. 2-, which has a hole tin'rethrough adapted to receive the reduced extension of the sleeve 5H; (12 dcsignates a washer; (ill designates a contact disk best shown in side elevation in Fig. and in front elevation in Fig. 2, having teeth (it on the periphery thereof and having a to the insulating bl ock' 66 b hole through the center thereof adapted to receive the reduced portion of sleeve-56; designates a nut which is screwed upon the reduced.ea'tensionof sleeve 56 so as'to clamp spring 67 adapted at proper times to contact with disks 59 and 61; a ring 68 which is adapted to contact'with isk 63 and spring 69whieh is adapted tocontact with sector 16, all of the sprin s being firmly atitaeh'ed means ofthe screws 70; the 5 rings eac have a-holethrough their rig t hand end as viewed in Fig. 2, which coincideQwith holes formed in the insulating block .66 and with fiber insulating bushings 71, best shown in Figs. 4- and' 5 so that screws 72, 73 and 74 may be passed therethrough to. connect the springs electrically with bars which may be placed back of .the individual. key; 75" designate stop pins best shown in Fig. 5 fqr prevcntingthe spring 28 from expandin more than it should; 76 designates a stop 'w ich, at the proper time, the arm 22 is adapted'to contact.

Referring to Fig. 8, 77 designates a' source of current; 78 a relay .coil having an arn'mture 79; 8O designates the commutator of armature'of a. motor having a field 81 and brushes 82 and 83; 84 designates a collector ring mounted on the same shaft as commutator S0, and connected to the middle point of windings forming an armature mounted on the same shaft as commutator 80, which armature furnishes direct current through the brushes 90 and 91 from the commutator 89 attached to the ends of-its windings; 85 designates a field winding for the armature which is connected to commutator 89 and which is separately excited from the battery 77; and an alternating current is generated. which is taken off of brush 86 hearing on collector ring-84 and passing through the condenser 87 to ground 88; 92 designates an armature controlled by the cores 93 and 9t of eleetromagnets and aying rigidly attached thereto, so as to osc llate therewith the rod 95 which bears at its upper end an insulating knob 96, positioned between two springs 97 and 98, which springs are connected to the brushes 90 and ll. and in the normal position are as shown, but when moved either to the right or to the left. n'zake contact with points 09. 101.100 and 10;, the said points being connected Ihrough the rcactance coils 103, 10 1, 103 .and 10F- to the tivo line wires 10? and 108, and bring connected together by condensers 109 and .10: 111 and 112 designate the cores of a selector such as described in our co-pcndin'g application Serial #590,252 filed Dccembcr 8, 1910; 113 designates'the armature adapted to crate with said cores 0scil-' latmg aboutt e knife edge bearin 11 1., hearing the arm 115, which has attac ed at its upper end thetwo dogs 116 and 117, adapted to 'contact with the two sectors 118 and 119'to rotate them independently and separately about the shaft 120, the sectors being held in the moved position by dogs 1.21 and- 122; 123 designatcs'a pin attached to sector 118, which, when sector 118 has been -moved sufficiently, contacts with springs 19A and moves itinto contact with spring 125;.

126 designates two. coils which are wound upon the same core but in opposite directions so as.to constitute a non-inductive resistance; 127 and 12Sdesigna'te contact arms which are..prcsscd into contact with points 129 and 175 when the sectors 11S and 119 have beempropcrly actuated, as fully explained in our co-pending application herein referred to;'13() designates a condenser; 131 a direct current, bell; 139 and 133 the cores of an electromagnct which actuate an armature 13-1 to operate a bell-hammer 135, whichstrikes when properly actuated, the gongs 136 and 137.

0pcrati0n.-The individual calling key itself is set in operation by turning the cross piece 14 in the direction of the arrow (1 as shown in F g.9, which operation causes sector 16 t immediately contact with spring 69 and to travel in contact therewith until the motion is stopped by the lill 9Q contacting with stop 76; the result oi turning the cross piece 14 in thedirection of the arrow (1, is to turn the shaft 11 in the same direction, which turning of the shaft 11, will cause the spring 28 to be tcnsioncd as the inner end .is fastened to thc pin J5 and the outer end is fastened to the member 1); the turning of shaft 11 will also cause sleeve 24- to turn and also cause ratchet 30, best shown in Fig. =1 to turn in the direction of 'the arrow (1, and b5 the teeth of the ratchet are so formed that the mwl 31 is not driven by them when the ratchet is turned in said direction, the pawl will simply be moved outwardly by the passage of the teeth and pressed inwardly again by the action of spring 34 as the successive teeth pass by it; when, however-{the pin 22 contacts with stop 76 and the cross piece 14 is released by the hand spring 38 being tcnsioned, causes a reverse turuin", namely, -in the direction of the arrow 0, Figs. 2 and i, so that the shaft, revolving in the direction of the arrow will cause the ratchet toothed sleeve to also revolve in the direction of,the arrow as it is rigidly attached thereto, and a tooth of the ratchet wheel 30 engaging with pawl -31 causes the car 33, to which pawl 11. is attached by pin 32, to revolve in the direction of the arrow c and the gear 33, meshing with pinion 40, causes the same to.

' Weights are rotated through a train of gears composed of 41 sttached rigidl x to shaft 42, to which the pinion 40 is attached, pinion 41h gearw-hcd l4, pinion =11), gear wheel 17,,

pinion 48, shaft 50 and cross piece 51. The weights are of such a length and of such a value, that the tram of gears will rotate at the lcsired speed, thus governing the rate of rotation-of, shaft -12 and its attached contact disks. f 1 hen shaft 11 returns to normal. position,

'rotating-in the direction of the arrow 11 Fig. 2, it rotates the shaft 42 in the direction ofthe arrow f, Fig, 2, preliminary movement in the direction of the-arrow cl, of shaft 11, the pin is moved out of contact with thepin the sleeve v and shaft 42 are free to rotate in the direction of the arrow fQwhich'flieydo, and in so doing the contact disk 59 hearing the teeth '60, passes over and contacts with the end of spring '67 in such a manner that each tooth makes a contact, with the spring (37 oil-which the frame of the .and the spring 67 the other.

r the teeth 64 on the inel'nber so'that'by the pas ngc oi the tectln contact isalternately madeand broken in circuit hey is one side After the teeth have completely passed the spring 67, (33 then contact with and-.pass over spring 68 in the some manner, and for the same pin-nose. an'o alter the teeth (341love performed their function,

the disk 61 then passes over spring 67 1nak- Y ing contact therewith and just after the disk 61 passes beyond the spring 67. the pin arrives at approximately i 5 initial position as showninl ig. 2,'so as to contact with pin-22f which'has also almostrcachcd its initial position as shown in Fig. 52;

The. length of time during which sector 16 is in contact with'syningfifl can be very easily regulated by rotating the sector 16 to any desired position about the shaft 11 after first loosening the two round headed capscrews-18. The period of time elapsing before teeth 60 make contact with spring" '67,

after shaft 11 begins to rotate in the direction of. thearrow e. is easily governed by adjusting the v position of the dis: upon 'the reduced portion of the sleeve 56 which may "be easily done by means of nut to and in 'tlie'same'way the contact disk 3 bearing the-teeth 64 is rotatablv' adjustable about the sleeve- 56 as is also disk 61.. 7

As shown in,Fig. 2, disksfi?) and 63 each haveS teeth formed in their periphery and so will each cause 8 makes and 8 breaks, but

the number of teeth may be as' ilesirc il, so that any desired number of makes and breaks can he obtained and in practi e 1n' and as by the so that tooth 139 is the space oftwo "tecth or there-about removed in the directionbf the arrow 7, Fig. 2, from the last remaining tooth on contact disk 59, then if any teeth are to be removed from disk 630118' shoiild conunence to remove them at the tooth i'arthest removed. from tooth 19$ As willbe seen later, the length of the contact .)art=o11co11- tact disk (31 governs the length of call and the length of call can be any desirediinie within the limit of the key by yarying the length of the contact part of contact dish (31, and in case teeth-should be rcmoved from the disks 59 and (33, the disk 61 should 'be rotated about the sleeve 56 intliQdircction, of the arrow f, Fig. 2, so that the end of the contact part of disk G1 should not be" farther removed from the last tooth remaining on disk 3 than the spacegof 2 or {Heath or thereabout. i v

As'will be seen later the sector 16, gQ n-ns I I the start-in and stoppingof a generator and it is desiralile to have the generator stopped imnicdiately after the contact disk L l i-breaks contact with spring 67 so in caqadarge number of teeth are rernovcd fronrdisks and 3 and, contact disk 61 is rotated considerably in the directions of the arrow 1, about sleeve 56, the sector 16 shouldbo rotated about the shaft 11 in the direction. of the arrow e, so that it will bneak conta t with spring 69 when returning {no normal position after being operatedimmediately after contact disk 61 has brokerncontact with spring (37. i In Fig. 8, two springs 67 are shown merely for the sake, of clearness'in dosoribing' the device, the arrow -1Z,-indica;tes; the direction sector 16 is moved when tifcrncd' by hand; the arrow 0, designates the direction the sector 16 mores when returned .by-the power of the spring; the arrows 9 indicate the direction of movement of disks 59, G3 and 61 when operating. I i

The manual. movemenhofi sector 16, in the direction of the arrow (Z, causestheoeme to contact with spring 69 which cause; current to flow in thofollowing path'zbattery 77, wirel ifi. wire 142, relay coil 8, wire 143, spring 69, sector 16, wire-"144; wires 14.5,- 1 16 and 147m the other side ofthe battery energizing the relay 78 and eausing' qthe arrnature'79 to make cdntact 'with wir 'lsw,

whereuponcurrent flowsinfithe rollowing path: battery 77,-wire 140,, 'wir1r149'," arma ture 79, Wire 148,- wi-re 150, field coil 81, Wires 151 and 147 to the other sldeof the,

that the armature of the motor rotates and causes a rotation of the armature to whichcommutator 89 and collector ring 81 are attached and at the same time a current flows fro wire 148 through WllO 152, lield 85 and wire 153 to wire 151, so that the field 85 1S energized and current is generated by the rotation of the armature bearing the commutator 89. As soon as the manual means for turning the sector 16 are removed,

the sector 16 begins to return to normal position, rotating in the direction of the arrow 6 by Virtue the tension of the spring 28 as heretofore described and causes disks 59, 63 and 61 to rotate in the direction of the arrow which soon causes the first tooth on disk 59 to contact with spring 67, which causes current to flow in the following path: battery 77, wire 140, wire 154, wire 155, coil about core 93, wire 156, wire 157, spring 67, first tooth 60, disk 59, wires 158, 159, 145, 1 16 and 147 to the other side of the battery which causes the right hand end of the armature 92. as seen in Fig. 8, to be drawn to the core 93, which causes the insulating button 96 to be drawn to the left;

thereby causing spring 98 to contact with point 102 and allow spring 97 by its natural resiliency to contact with point 100 and as a current has been generated by a rotation of the armature of-the converter. current may be considered to flow from brush 91 to Wire 160, spring 97, point 100 wire 161,

, through reactance coils 103 and 104 to wire 108 and through wire 108 to wires 162 and 163 to the coil about core 111, then by wire 164 to and through the left hand resistance 126 to the right hand resistance 126, through wire 165, coil on core 112, wire 166, wires 167 and 168 to wire 107 and then through wire 169 through reactance coils 105 and 106 and wire 170 and 171 to point 102. spring 98, wire 172 to brush. 90, so completing the circuit and causing armature 113 to operate sector 118 one step forward. The passing of the first tooth 60 on disk 59 "yond spring 67 breaks the circuit through spring 67 and the coil on core 93, so that the armature 92 bearing the in sulating button 96 returns to normal position and breaks the heretofore described circuit through the selector at the remote station so that the armature 113 returns to normal position and the sector 118 remains in the moved position by virtue of the dog 121 engaging with the teeth thereon. but a circuit is again soon formed as before by the contact of the second tooth 60 of disk 59 with the brush 67 so that sector 118 at the remote station is again moved forward one tooth and so on until all of the teeth 60 on the disk 59 have passed beyond the spring After the teeth 60 on the disk 59 have operated as heretofore described, the first tooth 64 on the disk 63 contacts with spring 68 and makes a circuit in which current flows as follows: battery 77, wire 140, wire 154, coil on core 94, wire 173, brush 68, first tooth 64 on disk 63, disk 63, wires 174, 1 .15, 146, and 147 to the other side of the battery; the current in the just described path causes the left hand end of the armature 92 to be drawn toward the core 91 which causes the insulating button 96 to press against the spring 97, causing it to makecontact with point 99 and. at the Sill. time allows spring 98, by its natural resiliency to make contact with point 101, so that a current flows from the generator in the following path: brush 91, wire 160, spring 97, oint 99, wire 175, wire 170, reactance coils 06, and 105, wire 169, line wire 1.07, wires 168, 167 and 166 through the coil on core 112, wire 165, to the right hand resistance 126; to the left hand resistance 126; who 1.64, coil on core 111, wire 163, wire 162,- line wire 108, reactance coils 104 and 103, wire 161, point 101, spring 98. wire 172, and brush 90, thus completing the circuit.

It will be noticed that the current in the last described path, flows out from the central station on line wire 107 and returns by line wire 108, whereas the current which formerly actuated the selector as described, flowed out on line wire 108 and returned by line wire 107, the result being that; the polarized armature 113 is now attracted'by the core 111 causing the .sector 119 to be actuated by the dog 117, to move it forward one step, and as soon as the first tooth 64 on disk 63 passes beyond spring 68, the armature returns to its normal position and the dog 122 holds the sector 119 in its moved po sition ready to be again actuated by the passing of the next tooth 6-1 of disk 63 by the spring 68. Disk 63 has been represented as having 4 operative teeth, and the further possible numbcrof teeth have been shown by dotted lines, sothat the resultof the circuits made and broken by disk 59 and the disk 63 is to advance the sector 118 three steps and the sector 119, four steps, which is assumed to be the combination necessary to so actuate the selector as represented so that the springs 127 and 128 will make contact with the points 129 and 175 when the selector is actuated again by current sent over the line wire caused by disk- 61 making contact with spring 67.

After all of the teeth 64 have performed their functions of contact with spring 68. the disk 61 then contacts with spring 67 forming a circuit in which current flows as follows: battery 77, wire 140, wire 15-1, wire 15.5, mil on core 93, wire 156, wire 176,

" spring 67, disk (31, wires 177, 116, and 147 to the other side of the battery, thus causing the righthand end of armature to be at tractetl as'before and cause the insulating knob 96 to push M 98 in contact with point -2 and allowspring 97 to make contact with spring 100, so that current'will again flow from the generator o means of 10 brushes 90 and 9.1 to the line wires and thrmigh the coils on the cores 1'11 and 112 of the selector and thus again actuate armature 113 so that its right hand end will he lifted toward core 11:2, thus causing; the see tors 11S and 119 to he placed in a position as fully described in our copendiug appli cation heretofore mentioned that upon the reusing of the current the (logs 1531 and 122 will allow them to fall back to normal po- 39 sition and break the current between springs 12? and 1-28 and points and 175 but While being held in such position by the pas sage of the contacting part of disk 61 over the spring .67, the contacts'lQ? and V will be making contact with points 12?) and 175 so that a current from the collectm' ring will flow by means of ii'rush and viii-c178, condenser 87 and ground 88 to ground at the selector station through Wire 179, coil-s 39 on cores 133 and 132 in series, wire 1S0, condenser 130, wire 1%, spring 128, point 12?), wire 191 to junction 192, then passing by a multiple circuit back to the two bri end 91 as follo\v One circuit bcii hand resistance 1.216, wire 16 1, wire on core 111, wire 153, Wire 162, line wire 10%, reactancecoils 10% and 103, Wire 161, point 100, spring 7, and wire 160 to brush 91, wire on the armature to which commutator 4o is attached to collector ring 84, the second circuit being from wire 191 at the selector station to right hand rbsistance 1%, wire 165, coil on core 112Qwires 1G6, 167 and 168 to line wire'107, then to wire 169 as and through 'reactanee 105 and 106 to wires 170, 171, and point 102m spring: 98, and Wire 172 to lorush. 90, through. the wire on the armature of which is the commutator,

to the collector ring 8%, so that the alterhating current generated and transmitted by means of the collector ring 84 and coninnn tater .89 will pass through the alternating current bell. the armature of which is 'iatetlby 13'} and the hammer of which is it 'ignnted by lli i'causingr the-same to ring atltihe same ti; o "the direct current gene? of hy the converter-will by nu-zins of i H 190 and 91. to the-bell 13 bll- 6d 97, point 100 wire 1G1, reactor r3107 Wire 10$,Wire 193" bill 131 wire 15) 127, point. 175, Wires 1%, i ens, L=

to line Wire 10? and men t"- e'ire 15S) and through reactance 103 and 10C to wires .170.

171, to point 102, to s 'iring to wire 1T7 l line wires 10? and lt 8. l

and the other brush 90, thus conniileting the circuit for the direct current which cententhe bell 131 to ring.

The springs 121 and constitute whet are called the all stations call contacts and 7 are so placed that if sector 'lltliis stepped. fOlWtU'tl a greater number of steps than urn needed to step up any combinati n on the line, the sprirrl s 152i and 12-3 will be. bro: together thus causing the alternating cur rent bells at every station to ring simultaneously for, as has been seen, the alternating current for ringing the alternating cnrrent bell-comes into the selector station from the ground by means of Wire 179 through coils upon the two cores 133 and 132 througl'i Wire 180 and a condenser 130, and wire l to spring 128, but if springs? 121 and were connected, the bell could lie made to ring without closing contactbetn-cen point 129 and spring for the current 1 ring in wire 190, could pass to Wire .1 ,1 through spring 12-1, to spring 125, to wire 193, to" junction and thence back to the "two brushes and 91 by the paths heretofore described. I I l A telephone 19'.) has been connected ucro' -s the line Wires 107 and 108 so that th'c-iitteiidant at the selector station'may, uyorf'the ringing of either the-alternating; or hell or bell 131, colnnn'inicatc with t crater at the central station, who '1na} 'l-ilicwise have a telephone connecting acrosetii r A clen r understnndingofthe circuiislicre tcfore described allows one to readily understand, that the bells at the selector station will ring as longas the contact part "of contact disk 61 is in Contact with, spring 62]. and; that as soon as it breakscontact therc with, the bells cease to ring and the seleetor returns to its" normal p'ositionat which time, asheretofore described, the incli 'idual celling ky'haS again returned to the position of'the parts as shown in Fig. 2 with tin-pin Z2 frestingfegeinst pin f c T he individual calling l e as heretofore described is, as its name ilnplu used sim ply for ealling one of a' number oi selector stafor eyery remote selector station on thehline .beine modified however onl in so far asthe :a a a o 559-, 63 and 61 are adjusted upon'the .ult 42, as heretofore describe: m! in so far. as sector 16 is'irdjusted upon it! 11 to correspond therewith, and ifurthe' I in so far as the number ef teeth on illB iSkS \tlld 63ers: conoerneiitibcing obvious that if the.combinationofn-seleetorictution 1 is} 5-- (Lathe number of teeth on clislcfifl will be 5 and the numlscr 'of teethon disk (33,ir'ill to 6; Whereas, if the combination were i-+4 there would be threeteeth upon disk 59 and ltceth upon disk. 63, and it may fur-ihcr be 13o observed that with a possible range of 8 teeth upon each dish 59 and 63, the possible range of combinations is (34, which ailords'a range ample to provide for the greatest number of selector stations which might possibly be upon any one line.

It must now be readilyscen-that applicants have devised a system and an individual callingJ-tey therefor which does away with the numerous objections to both the socalled --lo'ca l energ systems and the so-.'

and by so using an intermittently operating converter a very smallx'rrumber of cells may beemployed, but the objections heretofore made to an intermittently operating converter, have been done awa with, for, in applicants key, the first manual motion in sending a call, starts the converter and just enough time is allowed to elapse between the first making of the contact which starts the converter, before current is supplied to the line to operatethe selectors for the converter to attain suilicient speed to furnish ample voltage tooperate the selectors at the remote stations, furthgirmore, after once manually operating theikey, no'further attention is needed, for allsof the time during which impulses are sent to the line,- the converter is in-operation, but immediately the impulses cease and the call has been sent, ringing the bells at the remote stations, the key, in and of itself, without anyfurther attention or operation by the operator, causes the breaking of a circuit, which causes the converter to be deprived of current and, therefore, causes it to cease ring-.

ing, thereby doing away with the formidable objections heretofore made against such systems in which it was possible to forget or neglect to shut down the converter, after call had been made.

Applicants having now disclosed the principle of their invention and having accurately described and illustrated a particular physical embodiment thereof, what we claim and desire to secure by Letters Pat- 'ent, is:

1. In a calling key in combination, a part adapted to be operated manually, means operatively connected to said part adapted to generate an electrical current upon the iniiial movement of said part, means operate-fl bv the return of said part to normal, adapted for sending a pred -termiilcd number of impulses of electricity in two d1rect1ons.and to sendvan additional impulse of definite length in one of said directions, said first mentioned means adapted to continue the generation ofclectrical current until said impulse of definite length has been sent and to thereafter discontinue.

2. In a calling key, in combination, a part adapted to be operated manually, means aetuated by said manual operation to return said part to initial position after being actuated manually, a generator, means actuated by said manual operation of saidpart adapted'on the initial movement of said part to start said generator and continue said gene orator in operation until said part returns to normal, and means for governing the current generated by said generator, actuated by said part. adapted to be operated manually.

Ina. calling key, in combination, a part to be operated manually, means adapted for returning said part to normal-position after being operated manually, a generator, means adapted for starting said generator upon the initial movement of said part manually and for continuing said generator in operation until said part returns to normal, means also set in operation by said manual opera.- ticn for sending a predetermined number of impulses in one direction from said generatcr, means also set in operation by said manual operation thereafter acting to send a further predetermined number of impulses from said generator in a reverse direction and means also set in operation by said manual operation thereafter acting to send a single. impulse in said first direction. 4. In a calling key, in combination, a shaft, a handle on said shaft, a sector on said shaft, a contact spring in proximity to said sector, a spring havi g one end fastened to said shaft, a fixed member to which the other end of said spring is fastened, a ratchet wheel attached to said shaft, a pawl pivoted on a gear wheel revoluble about said shaft, a spring fastened to said gear wheel .at one end and pressing said pawl into engagement with said ratchet at the other end, a pinion meshing with said gear wheel, a shaft on which said pinion is mounted, a hub fastened to said shaft, a disk having teeth adjustably mounted on said hub, a contact spring mounted in the path of said teeth, a second disk having teeth adjustably mounted on said hub, a contact spring in the path of said teeth, a third disk adjustably mounted on said hub and having a part in the plane of said second mentioned contact spring, a centrifugal governor, a train of gears connecting said second mentioned shaft with said governor, a stop on said hub and a step on said first. mentioned shaft adapted to contact at normal position, and a fixed stop adapted. to contact with said stop on said shaft in reverse position.

5. In a calling key, in combination, a

source of current, a converterconnected to said source in a partial, circuit. means to con'gplete said partial circuit by the initial operation of said calling lcc v and to maintain Mild partial circuit completed until said .kev returns to normal.

(3. In a calling key, in combination, a generator adapted to furnish current,line wires, a selector connected to said line Wires at. a ren'iote point. a nd means interposed between said line wires and said generator adapted by a single manual movement to start said generator and to cause impulses of current to fiOW from said generator to said line Wires a predetermined number of times. means thereafter acting to cause said current to low in the reverse direction a predetern'iined number of times and means thereafter acting-to cause said currtu t to flow in said first direction.

T. In a calling key. in combination, a gen erator, means fun operating said generator, a selector, line ires connecting said generator and said selector, means interposed in said line, wires adapted to cause said means for operatinq said generator to act. and to cause the current generated by said generator to flow first a predetermined number of times in one direction, then a predetermined number of times in the reverse direction, and then once in the first named direction.

8. in an individual calling key. a generator, means to operate said generator. a lector, means connecting said generator and selector. said means including means op-' cralde by a single manual motion. to start said generator. control the flow of current from said generator to said selector, and keep said generator running until said means returns to normal position.

it. In a calling key, in combination, a generator. means for causing said generator to operate. a signal. line wires connecting said generator and said signal. means operable by a single manual mction interposed in said line wires adapted to operate said means for causing said gGi'ltfl'iilOl to act, cause the current generated by said generator to tlon" to said signal. and keep said generator running until said means returns to normal position.

10. In a signal device. normallv (let-inergized conductors. a source of current, a converter, a normally open circuit connecting said source and converter. a transmitting device c icrativcly connected to the converter and t the conductors, a signal device governed bv the transmitting device through the conductors, and means operated in unison with the transmitting device to cause the com crter to start and remain running until said means returns to normal.

11. lo a calling key, in combination, a generator. means for operating; said generaa selecttr, line wires connecting sald generator and said selector, means inter posed in said line Wires adapted to cause said means for operating sa d generator to act. and to cause the current generated by StlKl generator to flow tirst a predetermined number of times in one direction, then a predetermined number ot'times in the reverse direction, and then once in the first named (infection, said means operable manu ally by one motion.

12.111 a calling key, in combination, a source of current, a converter, a selector, line wires connecting the converter and the selector, means interposed in said line wires adapted on its initial movement to reverse from normal to cause said converter to op-' crate by current from said source and to continue operating until said means returns to normal, said means including a pole changing relay and so governing the current generated by said converter as to cause'it to {low first in one direction in said line wires and then in the reverse direction and then in said first direction again.

13. In a calling key, in combination. a

source of current, a converter C(Hlllt3t1l1tlti to said source in a partial circuit, means to complete said partial circuit. by the initial or ration of said calling: key and to main lain said partial circuit completed until said hey returns to normal line Wires, a selector, means set in motion by the return of said first mentioned means to normal to cause the current generated b v said converter to [low a predetermined nun'lber of times in one direc- "ion and then a predetermined number of times in a reverse direction. and then in said first mentioned direction again, through said line wires. said line Wirescomiected to said selector. thus causing said selector to selectivcl operate.

cmiverter. a signaling device. conductors extending from said converter to the signaling device. a transmitter interposel said connections adapted when operated in one direction only to modify the current n erated by said converter.

na smu'ce of current, connections from said source of'curreut to said converter, and a normally open malt in said circuit controlled by said transmitter.

15. In a signal system. a signaling device, a source of current. a converter ct'muectcd to said stance in a normally open circuit, con doctors connecting aid. signaling: doth c and said converter, a transmitter interposed in said conductors. and means gcwrned by said transmitter to close said normally open cur-- cult upon the initial increment thcreo'f, said transmitter adapted to automatically return to normal position.

16. In a selective calling key, in combination, a source of current, connections to the source of current, line wires, connections to the line Wires, means to connect said connections so that a predetermined number of positive impulses of electricity will be sent in one direction to the second said c0nnec- -tions and means thereafter operating to send a predetermined number of positive impulses in another direction to the second said connections.

17. In a selective calling device, means for end to reverse the direction of flow after a,

predetermined number of impulses are impressed and to thereafter impress a pre' determined further number in the said 10- 15 verse direction.

MAURICE F. GEEK. RICHARD C. LEAKE. Witnesses for Geer:

LILLIAN L. Pnnmrs, W. W. REID. Witnesses for Leake:

V. L. SIMMONS, B. G. VRIGHT, Jr. 

